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Nano Research 2019, 12(8): 1943-1951 https://doi.org/10.1007/s12274-019-2462-0
Research Article | Issue | Published: 11 July 2019

In situ fabrication of organic electrochemical transistors on a microfluidic chip

Show Author's Information Jianlong Ji1,2,  Mangmang Li1,  Zhaowei Chen3,  Hongwang Wang1,  Xiaoning Jiang2,  Kai Zhuo1,  Ying Liu1,  Xing Yang4,  Zhen Gu3,  Shengbo Sang1( ),  Yang Shu5( )
College of Information and Computer,Taiyuan University of Technology,Taiyuan,030024,China;
Department of Mechanical and Aerospace Engineering,North Carolina State University,Raleigh,27695,USA;
Department of Bioengineering, California Nanosystems Institute,University of California,Los Angeles, Los Angeles,90095,USA;
The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument, Tsinghua University,Beijing,100084,China;
Department of Chemistry,Colleges of Sciences, Northeastern University,Shenyang,110819,China;
Keywords:
electrodeposition, transistor, in situ, microfluidic chip, PEDOT: PSS/GQDs composite
Topics:
ElectrodesFabricationSemiconductor quantum dots
Cite this article:
Ji J, Li M, Chen Z, et al. In situ fabrication of organic electrochemical transistors on a microfluidic chip. Nano Research, 2019, 12(8): 1943-1951. https://doi.org/10.1007/s12274-019-2462-0
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Abstract Full text Electronic supplementary material About this article

Microfluid chips integrating with organic electrochemical transistors (OECTs) are useful for manufacturing biosensors with high throughput and large-scale analyses. We report here the utilization of alternating current (AC) electrodeposition to fabricate OECTs in situ on a microfluid chip. With this method, the organic semiconductor (OS) layer with a channel length of 8 μm was readily prepared without requiring the post-bonding process in the conventional construction of microfluidic chips. Poly(3, 4-ethylenedioxythiophene): poly(4-styrenesulfonate)/graphene quantum dots (PEDOT: PSS/GQDs) composites with different morphologies, such as microfilms, nanodendrites and nanowires were electropolymerized. The mass transfer process of the electropolymerization reaction was evidenced to be diffusion limited. Morphologies, growth directions, and chemical structures of OS layers could be tuned by the amplitude and the frequency of the AC voltage. Transfer and output characteristic curves of OECTs were measured on the microfluidic chip. The maximum transconductance, on/off current ratio and threshold voltage measured in the experiment was 1.58 mS, 246, and 0.120 V, respectively.


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Abstract
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Electronic supplementary material
About this article

In situ fabrication of organic electrochemical transistors on a microfluidic chip

Show Author's information Jianlong Ji1,2, Mangmang Li1, Zhaowei Chen3, Hongwang Wang1, Xiaoning Jiang2, Kai Zhuo1, Ying Liu1, Xing Yang4, Zhen Gu3, Shengbo Sang1( ), Yang Shu5( )
College of Information and Computer,Taiyuan University of Technology,Taiyuan,030024,China;
Department of Mechanical and Aerospace Engineering,North Carolina State University,Raleigh,27695,USA;
Department of Bioengineering, California Nanosystems Institute,University of California,Los Angeles, Los Angeles,90095,USA;
The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument, Tsinghua University,Beijing,100084,China;
Department of Chemistry,Colleges of Sciences, Northeastern University,Shenyang,110819,China;

Abstract

Microfluid chips integrating with organic electrochemical transistors (OECTs) are useful for manufacturing biosensors with high throughput and large-scale analyses. We report here the utilization of alternating current (AC) electrodeposition to fabricate OECTs in situ on a microfluid chip. With this method, the organic semiconductor (OS) layer with a channel length of 8 μm was readily prepared without requiring the post-bonding process in the conventional construction of microfluidic chips. Poly(3, 4-ethylenedioxythiophene): poly(4-styrenesulfonate)/graphene quantum dots (PEDOT: PSS/GQDs) composites with different morphologies, such as microfilms, nanodendrites and nanowires were electropolymerized. The mass transfer process of the electropolymerization reaction was evidenced to be diffusion limited. Morphologies, growth directions, and chemical structures of OS layers could be tuned by the amplitude and the frequency of the AC voltage. Transfer and output characteristic curves of OECTs were measured on the microfluidic chip. The maximum transconductance, on/off current ratio and threshold voltage measured in the experiment was 1.58 mS, 246, and 0.120 V, respectively.

Keywords: electrodeposition, transistor, in situ, microfluidic chip, PEDOT: PSS/GQDs composite

References(71)

1

Rivnay, J.; Inal, S.; Salleo, A.; Owens, R. M.; Berggren, M.; Malliaras, G. G. Organic electrochemical transistors. Nat. Rev. Mater. 2018, 3, 17086.
DOI Google Scholar
2

Tang, H.; Yan, F.; Lin, P.; Xu, J. B.; Chan, H. L. W. Highly sensitive glucose biosensors based on organic electrochemical transistors using platinum gate electrodes modified with enzyme and nanomaterials. Adv. Funct. Mater. 2011, 21, 2264-2272.
DOI Google Scholar
3

Tang, H.; Lin, P.; Chan, H. L. W.; Yan, F. Highly sensitive dopamine biosensors based on organic electrochemical transistors. Biosens. Bioelectron. 2011, 26, 4559-4563.
DOI Google Scholar
4

Lin, P.; Luo, X. T.; Hsing, I. M.; Yan, F. Organic electrochemical transistors integrated in flexible microfluidic systems and used for label-free DNA sensing. Adv. Mater. 2011, 23, 4035-4040.
DOI Google Scholar
5

Hempel, F.; Law, J. K. Y.; Nguyen, T. C.; Munief, W.; Lu, X. L.; Pachauri, V.; Susloparova, A.; Vu, X. T.; Ingebrandt, S. PEDOT: PSS organic electrochemical transistor arrays for extracellular electrophysiological sensing of cardiac cells. Biosens. Bioelectron. 2017, 93, 132-138.
DOI Google Scholar
6

Lin, P.; Yan, F.; Yu, J. J.; Chan, H. L. W.; Yang, M. The application of organic electrochemical transistors in cell-based biosensors. Adv. Mater. 2010, 22, 3655-3660.
DOI Google Scholar
7

Gu, X.; Yao, C. L.; Liu, Y.; Hsing, I. M. 16-channel organic electrochemical transistor array for in vitro conduction mapping of cardiac action potential. Adv. Healthc. Mater. 2016, 5, 2345-2351.
DOI Google Scholar
8

Liang, Y. Y.; Ernst, M.; Brings, F.; Kireev, D.; Maybeck, V.; Offenhäusser, A.; Mayer, D. High performance flexible organic electrochemical transistors for monitoring cardiac action potential. Adv. Healthc. Mater. 2018, 7, 1800304.
DOI Google Scholar
9

White, S. P.; Dorfman, K. D.; Frisbie, C. D. Label-free DNA sensing platform with low-voltage electrolyte-gated transistors. Anal. Chem. 2015, 87, 1861-1866.
DOI Google Scholar
10

Parlak, O.; Keene, S. T.; Marais, A.; Curto, V. F.; Salleo, A. Molecularly selective nanoporous membrane-based wearable organic electrochemical device for noninvasive cortisol sensing. Sci. Adv. 2018, 4, 2904.
DOI Google Scholar
11

Curto, V. F.; Marchiori, B.; Hama, A.; Pappa, A. M.; Ferro, M. P.; Braendlein, M.; Rivnay, J.; Fiocchi, M.; Malliaras, G. G.; Ramuz, M. et al. Organic transistor platform with integrated microfluidics for in-line multi-parametric in vitro cell monitoring. Microsyst. Nanoeng. 2017, 3, 17028.
DOI Google Scholar
12

Liao, Z. R.; Wang, J. F.; Zhang, P. J.; Zhang, Y.; Miao, Y. F.; Gao, S. M.; Deng, Y. L.; Geng, L. N. Recent advances in microfluidic chip integrated electronic biosensors for multiplexed detection. Biosens. Bioelectron. 2018, 121, 272-280.
DOI Google Scholar
13

Kim, S. H.; Hong, K.; Xie, W.; Lee, K. H.; Zhang, S. P.; Lodge, T. P.; Frisbie, C. D. Electrolyte-gated transistors for organic and printed electronics. Adv. Mater. 2013, 25, 1822-1846.
DOI Google Scholar
14

Friedlein, J. T.; McLeod, R. R.; Rivnay, J. Device physics of organic electrochemical transistors. Org. Electron. 2018, 63, 398-414.
DOI Google Scholar
15

Zhang, M.; Lin, P.; Yang, M.; Yan, F. Fabrication of organic electrochemical transistor arrays for biosensing. Biochim. Biophys. Acta 2013, 1830, 4402-4406.
DOI Google Scholar
16

DeFranco, J. A.; Schmidt, B. S.; Lipson, M.; Malliaras, G. G. Photolithographic patterning of organic electronic materials. Org. Electron. 2006, 7, 22-28.
DOI Google Scholar
17

Sessolo, M.; Khodagholy, D.; Rivnay, J.; Maddalena, F.; Gleyzes, M.; Steidl, E.; Buisson, B.; Malliaras, G. G. Easy-to-fabricate conducting polymer microelectrode arrays. Adv. Mater. 2013, 25, 2135-2139.
DOI Google Scholar
18

Curto, V. F.; Ferro, M. P.; Mariani, F.; Scavetta, E.; Owens, R. M. A planar impedance sensor for 3D spheroids. Lab Chip 2018, 18, 933-943.
DOI Google Scholar
19

Pappa, A. M.; Curto, V. F.; Braendlein, M.; Strakosas, X.; Donahue, M. J.; Fiocchi, M.; Malliaras, G. G.; Owens, R. M. Organic transistor arrays integrated with finger-powered microfluidics for multianalyte saliva testing. Adv. Healthc. Mater. 2016, 5, 2295-2302.
DOI Google Scholar
20

Guo, X.; Liu, J.; Liu, F. Y.; She, F.; Zheng, Q.; Tang, H.; Ma, M.; Yao, S. Z. Label-free and sensitive sialic acid biosensor based on organic electrochemical transistors. Sens. Actuators B 2017, 240, 1075-1082.
DOI Google Scholar
21

Fonseca, S. M.; Moreira, T.; Jorge Parola, A.; Pinheiro, C.; Laia, C. A. T. PEDOT electrodeposition on oriented mesoporous silica templates for electrochromic devices. Sol. Energy Mater. Sol. Cells 2017, 159, 94-101.
DOI Google Scholar
22

Shi, Y. D.; Zhang, Y.; Tang, K.; Song, Y. B.; Cui, J. W.; Shu, X.; Wang, Y.; Liu, J. Q.; Wu, Y. C. In situ growth of PEDOT/graphene oxide nanostructures with enhanced electrochromic performance. RSC Adv. 2018, 8, 13679-13685.
DOI Google Scholar
23

Demuru, S.; Deligianni, H. Surface PEDOT: nafion coatings for enhanced dopamine, serotonin and adenosine sensing. J. Electrochem. Soc. 2017, 164, G129-G138.
DOI Google Scholar
24

Si, W. M.; Lei, W.; Han, Z.; Hao, Q. L.; Zhang, Y. H.; Xia, M. Z. Selective sensing of catechol and hydroquinone based on poly(3, 4-ethylenedioxythiophene)/nitrogen-doped graphene composites. Sens. Actuator B 2014, 199, 154-160.
DOI Google Scholar
25

Song, J. C.; Noh, H.; Lee, J.; Nah, I. W.; Cho, W. I.; Kim, H. T. In situ coating of poly(3, 4-ethylenedioxythiophene) on sulfur cathode for high performance lithium-sulfur batteries. J. Power Sources 2016, 332, 72-78.
DOI Google Scholar
26

Si, W. M.; Lei, W.; Han, Z.; Zhang, Y. H.; Hao, Q. L.; Xia, M. Z. Electrochemical sensing of acetaminophen based on poly(3, 4-ethylenedioxythiophene)/graphene oxide composites. Sens. Actuator B 2014, 193, 823-829.
DOI Google Scholar
27

Koizumi, Y.; Shida, N.; Ohira, M.; Nishiyama, H.; Tomita, I.; Inagi, S. Electropolymerization on wireless electrodes towards conducting polymer microfibre networks. Nat. Commun. 2016, 7, 10404.
DOI Google Scholar
28

Yang, X.; Wang, Q.; Fan, J. R.; Zhang, M.; Zhou, Z. Y.; Ji, J. L. Extremely sensitive sers detection through the one-step fabrication of a composite nanostructure of substrate and analyte. ECS Electrochem. Lett. 2015, 4, B17-B20.
DOI Google Scholar
29

Ji, J. L.; Li, P. W.; Sang, S. B.; Zhang, W. D.; Zhou, Z. Y.; Yang, X.; Dong, H. L.; Li, G.; Hu, J. Electrodeposition of Au/Ag bimetallic dendrites assisted by faradaic AC-electroosmosis flow. AIP Adv. 2014, 4, 031329.
DOI Google Scholar
30

Zhang, M.; Yang, X.; Zhou, Z. Y.; Ye, X. Y. Controllable growth of gold nanowires and nanoactuators via high-frequency AC electrodeposition. Electrochem. Commun. 2013, 27, 133-136.
DOI Google Scholar
31

Ji, J. L.; Zhou, Z. Y.; Yang, X.; Zhang, W. D.; Sang, S. B.; Li, P. W. One-dimensional nano-interconnection formation. Small 2014, 9, 3014-3029.
DOI Google Scholar
32

Chen, S.; Hai, X.; Xia, C.; Chen, X. W.; Wang, J. H. Preparation of excitation-independent photoluminescent graphene quantum dots with visible-light excitation/emission for cell imaging. Chem. -Eur. J. 2013, 19, 15918-15923.
DOI Google Scholar
33

Oberhammer, J.; Stemme, G. BCB contact printing for patterned adhesive full-wafer bonded 0-level packages. J. Microelectromech. Syst. 2005, 14, 419-425.
DOI Google Scholar
34

Khodagholy, D.; Rivnay, J.; Sessolo, M.; Gurfinkel, M.; Leleux, P.; Jimison, L. H.; Stavrinidou, E.; Herve, T.; Sanaur, S.; Owens, R. M. et al. High transconductance organic electrochemical transistors. Nat. Commun. 2013, 4, 2133.
DOI Google Scholar
35

Stavrinidou, E.; Leleux, P.; Rajaona, H.; Khodagholy, D.; Rivnay, J.; Lindau, M.; Sanaur, S.; Malliaras, G. G. Direct measurement of ion mobility in a conducting polymer. Adv. Mater. 2013, 25, 4488-4493.
DOI Google Scholar
36

Garreau, S.; Duvail, J. L.; Louarn, G. Spectroelectrochemical studies of poly(3, 4-ethylenedioxythiophene) in aqueous medium. Synth. Met. 2001, 125, 325-329.
DOI Google Scholar
37

Heinze, J.; Frontana-Uribe, B. A.; Ludwigs, S. Electrochemistry of conducting polymers-persistent models and new concepts. Chem. Rev. 2010, 110, 4724-4771.
DOI Google Scholar
38

Castagnola, V.; Bayon, C.; Descamps, E.; Bergaud, C. Morphology and conductivity of pedot layers produced by different electrochemical routes. Synth. Met. 2014, 189, 7-16.
DOI Google Scholar
39

Randriamahazaka, H.; Noël, V.; Chevrot, C. Nucleation and growth of poly(3, 4-ethylenedioxythiophene) in acetonitrile on platinum under potentiostatic conditions. J. Electroanal. Chem. 1999, 472, 103-111.
DOI Google Scholar
40

Heinze, J.; Rasche, A.; Pagels, M.; Geschke, B. On the origin of the so-called nucleation loop during electropolymerization of conducting polymers. J. Phys. Chem. B 2007, 111, 989-997.
DOI Google Scholar
41

Du, X.; Wang, Z. Effects of polymerization potential on the properties of electrosynthesized PEDOT films. Electrochim. Acta 2003, 48, 1713-1717.
DOI Google Scholar
42

Tamburri, E.; Orlanducci, S.; Toschi, F.; Terranova, M. L.; Passeri, D. Growth mechanisms, morphology, and electroactivity of PEDOT layers produced by electrochemical routes in aqueous medium. Synth. Met. 2009, 159, 406-414.
DOI Google Scholar
43

Tamburri, E.; Guglielmotti, V.; Orlanducci, S.; Terranova, M. L. Structure and I2/I- redox catalytic behaviour of PEDOT-PSS films electropolymerized in aqueous medium: Implications for convenient counter electrodes in DSSC. Inorg. Chim. Acta 2011, 377, 170-176.
DOI Google Scholar
44

Youk, J. H.; Locklin, J.; Xia, C. J.; Park, M. K.; Advincula, R. Preparation of gold nanoparticles from a polyelectrolyte complex solution of terthiophene amphiphiles. Langmuir 2001, 17, 4681-4683.
DOI Google Scholar
45

Schweiss, R.; Lubben, J. F.; Johannsmann, D.; Knoll, W. Electropolymerization of ethylene dioxythiophene (EDOT) in micellar aqueous solutions studied by electrochemical quartz crystal microbalance and surface plasmon resonance. Electrochim. Acta 2005, 50, 2849-2856.
DOI Google Scholar
46

Bobacka, J.; Lewenstam, A.; Ivaska, A. Electrochemical impedance spectroscopy of oxidized poly(3, 4-ethylenedioxythiophene) film electrodes in aqueous solutions. J. Electroanal. Chem. 2000, 489, 17-27.
DOI Google Scholar
47

Melato, A. I.; Viana, A. S.; Abrantes, L. M. Different steps in the electrosynthesis of poly(3, 4-ethylenedioxythiophene) on platinum. Electrochim. Acta 2008, 54, 590-597.
DOI Google Scholar
48

Orazem, M. E.; Tribollet, B. Electrochemical Impedance Spectroscopy; John Wiley & Sons: New York, 2008.
DOI
49

Thapa, P. S.; Ackerson, B. J.; Grischkowsky, D. R.; Flanders, B. N. Directional growth of metallic and polymeric nanowires. Nanotechnology 2009, 20, 235307.
DOI Google Scholar
50

Botasini, S.; Mendez, E. Limited diffusion and cell dimensions in a micrometer layer of solution: An electrochemical impedance spectroscopy study. ChemElectroChem 2017, 4, 1891-1895.
DOI Google Scholar
51

Scharifker, B. R.; García-Pastoriza, E.; Marino, W. The growth of polypyrrole films on electrodes. J. Electroanal. Chem. 1991, 300, 85-98.
DOI Google Scholar
52

Garfias-García, E.; Romero-Romo, M.; Ramírez-Silva, M. T.; Morales, J.; Palomar-Pardavé, M. Mechanism and kinetics of the electrochemical formation of polypyrrole under forced convection conditions. J. Electroanal. Chem. 2008, 613, 67-79.
DOI Google Scholar
53

Velev, O. D.; Gangwal, S.; Petsev, D. N. Particle-localized AC and DC manipulation and electrokinetics. Annu. Rep. Prog. Chem., Sect. C: Phys. Chem. 2009, 105, 213-246.
DOI Google Scholar
54

Velev, O. D.; Bhatt, K. H. On-chip micromanipulation and assembly of colloidal particles by electric fields. Soft Matter 2006, 2, 738-750.
DOI Google Scholar
55

Velev, O. D. Assembly of electrically functional microstructures from colloidal particles. In Colloids and Colloid Assemblies: Synthesis, Modification, Organization and Utilization of Colloid Particles. Caruso, F., Ed.; Wiley-VCH Verlag GmbH & Co. KGaA: Weinheim, 2004.
56

Jones, T. B.; Jones, T. B. Electromechanics of Particles; Cambridge University Press: Cambridge, 2005.
57

Du, Y.; Cui, X.; Li, L.; Tian, H.; Yu, W. X.; Zhou, Z. X. Dielectric properties of DMSO-doped-PEDOT: PSS at THz frequencies. Phys. Status Solidi B 2017, 255, 1700547.
DOI Google Scholar
58

Randriamahazaka, H.; Sini, G.; Tran Van, F. Electrodeposition mechanisms and electrochemical behavior of poly(3, 4-ethylenedithiathiophene). J. Phys. Chem. C 2007, 111, 4553-4560.
DOI Google Scholar
59

Gamburg, Y. D.; Zangari, G. Theory and Practice of Metal Electrodeposition; Springer: New York, 2011.
DOI
60

Sakmeche, N.; Aeiyach, S.; Aaron, J. J.; Jouini, M.; Lacroix, J. C.; Lacaze, P. C. Improvement of the electrosynthesis and physicochemical properties of poly(3, 4-ethylenedioxythiophene) using a sodium dodecyl sulfate micellar aqueous medium. Langmuir 1999, 15, 2566-2574.
DOI Google Scholar
61

Garreau, S.; Louam, G.; Lefrant, S.; Buisson, J. P.; Froyer, G. Optical study and vibrational analysis of the poly (3, 4-ethylenedioxythiophene) (PEDT). Synth. Met. 1999, 101, 312-313.
DOI Google Scholar
62

Akimoto, M.; Furukawa, Y.; Takeuchi, H.; Harada, I.; Soma, Y.; Soma, M. Correlation between vibrational spectra and electrical conductivity of polythiophene. Synth. Met. 1986, 15, 353-360.
DOI Google Scholar
63

Alam, M. M.; Wang, J.; Guo, Y. Y.; Lee, S. P.; Tseng, H. S. Electrolyte-gated transistors based on conducting polymer nanowire junction arrays. J. Phys. Chem. B 2005, 109, 12777-12784.
DOI Google Scholar
64

Bernards, D. A.; Malliaras, G. G. Steady-state and transient behavior of organic electrochemical transistors. Adv. Funct. Mater. 2007, 17, 3538-3544.
DOI Google Scholar
65

Inal, S.; Malliaras, G. G.; Rivnay, J. Benchmarking organic mixed conductors for transistors. Nat. Commun. 2017, 8, 1767.
DOI Google Scholar
66

Pathak, C. S.; Singh, J. P.; Singh, R. Preparation of novel graphene-PEDOT: PSS nanocomposite films and fabrication of heterojunction diodes with n-Si. Chem. Phys. Lett. 2018, 694, 75-81.
DOI Google Scholar
67

Khodagholy, D.; Doublet, T.; Quilichini, P.; Gurfinkel, M.; Leleux, P.; Ghestem, A.; Ismailova, E.; Hervé, T.; Sanaur, S.; Bernard, C. et al. In vivo recordings of brain activity using organic transistors. Nat. Commun. 2013, 4, 1575.
DOI Google Scholar
68

Kepić, D. P.; Marković, Z. M.; Jovanović, S. P.; Peruško, D. B.; Budimir, M. D.; Holclajtner-Antunović, I. D.; Pavlović, V. B.; Marković, B. M. T. Preparation of PEDOT: PSS thin films doped with graphene and graphene quantum dots. Synth. Met. 2014, 198, 150-154.
DOI Google Scholar
69

Tarabella, G.; Balducci, A. G.; Coppedè, N.; Marasso, S.; D'Angelo, P.; Barbieri, S.; Cocuzza, M.; Colombo, P.; Sonvico, F.; Mosca, R. et al. Liposome sensing and monitoring by organic electrochemical transistors integrated in microfluidics. Biochim. Biophys. Acta 2013, 1830, 4374-4380.
DOI Google Scholar
70

Kim, S. H.; Hong, K.; Lee, K. H.; Frisbie, C. D. Performance and stability of aerosol-jet-printed electrolyte-gated transistors based on poly(3-hexylthiophene). ACS Appl. Mater. Interfaces 2013, 5, 6580-6585.
DOI Google Scholar
71

Louet, C.; Cantin, S.; Dudon, J. P.; Aubert, P. H.; Vidal, F.; Chevrot, C. A comprehensive study of infrared reflectivity of poly(3, 4-ethylenedioxythiophene) model layers with different morphologies and conductivities. Sol. Energy Mater. Sol. Cells 2015, 143, 141-151.
DOI Google Scholar
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Publication history
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Acknowledgements

Publication history

Received: 06 January 2019
Revised: 10 June 2019
Accepted: 11 June 2019
Published: 11 July 2019
Issue date: August 2019

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Acknowledgements

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Nos. 51705354, 51622507, and 61671271); Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (Nos. 183290224-S and 201802029).

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